cs11dotnet7/vscode/PracticalApps/Northwind.Common.DataContext.Sqlite/NorthwindContext.cs

using System;
using System.Collections.Generic;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata;

namespace Packt.Shared
{
  public partial class NorthwindContext : DbContext
  {
    public NorthwindContext()
    {
    }

    public NorthwindContext(DbContextOptions<NorthwindContext> options)
        : base(options)
    {
    }

    public virtual DbSet<Category> Categories { get; set; } = null!;
    public virtual DbSet<Customer> Customers { get; set; } = null!;
    public virtual DbSet<Employee> Employees { get; set; } = null!;
    public virtual DbSet<EmployeeTerritory> EmployeeTerritories { get; set; } = null!;
    public virtual DbSet<Order> Orders { get; set; } = null!;
    public virtual DbSet<OrderDetail> OrderDetails { get; set; } = null!;
    public virtual DbSet<Product> Products { get; set; } = null!;
    public virtual DbSet<Shipper> Shippers { get; set; } = null!;
    public virtual DbSet<Supplier> Suppliers { get; set; } = null!;
    public virtual DbSet<Territory> Territories { get; set; } = null!;

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
      if (!optionsBuilder.IsConfigured)
      {
        string dir = Environment.CurrentDirectory;
        string path = string.Empty;

        if (dir.EndsWith("net7.0"))
        {
          // Running in the <project>\bin\<Debug|Release>\net7.0 directory.
          path = Path.Combine("..", "..", "..", "..", "Northwind.db");
        }
        else
        {
          // Running in the <project> directory.
          path = Path.Combine("..", "Northwind.db");
        }

        optionsBuilder.UseSqlite($"Filename={path}");
      }
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
      modelBuilder.Entity<OrderDetail>(entity =>
      {
        entity.HasKey(e => new { e.OrderId, e.ProductId });

        entity.HasOne(d => d.Order)
                  .WithMany(p => p.OrderDetails)
                  .HasForeignKey(d => d.OrderId)
                  .OnDelete(DeleteBehavior.ClientSetNull);

        entity.HasOne(d => d.Product)
                  .WithMany(p => p.OrderDetails)
                  .HasForeignKey(d => d.ProductId)
                  .OnDelete(DeleteBehavior.ClientSetNull);
      });

      modelBuilder.Entity<Product>()
        .Property(product => product.UnitPrice)
        .HasConversion<double>();

      OnModelCreatingPartial(modelBuilder);
    }

    partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
  }
}